Macro-mutation induced in okra Abelmoschus esculentus (L.) moench by gamma radiation and ethyl methane sulphonate

Singh, A.K.; Singh, K.P.

Environment and Ecology 23S(Special 3): 454-458


ISSN/ISBN: 0970-0420
Accession: 004448529

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The seeds of three okra genotypes, namely Parbhani Kranti, Hisar Unnat and Satdhari were treated with gamma rays at 15, 30, 45 and 60 kR; and ethyl methanesulfonate (EMS) at 0.25, 0.50, 075 and 1.00% and observations were recorded in M2, M3 and M5 generations. In the treated population, a number of mutants with one or more modified traits (height, maturity, branching, pigmentation, fruit size and yield) were isolated in M2/M3 generations. A total of 114 viable mutations (94.46%/1000 M2 plant) were identified in Parbhani Kranti, 116 (98.52%/1000 M2 plant) in Hisar Unnat, and 98 (82.29%/1000 M2 plant) in Satdhari. In all the genotypes, the maximum frequency of viable mutations was observed at 60 kR followed by 45 kR doses of gamma rays and 1.00% concentration of EMS. All the doses of mutagenic treatments were effective in inducing viable mutations in all genotypes. The performance and segregation pattern of these mutants were studied in M4. Among the large number of mutants, 8 in Parbhani Kranti, 11 in Hisar Unnat and 7 in Satdhari may prove useful for the improvement of this crop, and found superior for one or more economics traits such as high yielder, more pods per plant, shorter internodes, more branches per plant, tall, dwarf, early-maturing, long and bold poded, short poded, bushy type and anthocyanin pigmented.